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Finding the Fourth Proportional to 159.62, 220.20 and 124.88

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Solution

The fourth proportional to 159.62, 220.20 and 124.88 is: 172.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.62 : 220.20 = 124.88 : x
  2. Step 2: Convert to fraction form
    159.62/220.20 = 124.88/x
  3. Step 3: Cross multiply
    159.62x = 220.20 × 124.88
  4. Step 4: Simplify right side
    159.62x = 27,498.58
  5. Step 5: Solve for x
    x = 27,498.58/159.62
  6. Step 6: Final answer
    x = 172.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.